Sir David Frederick Attenborough is one of the world's best known broadcasters and naturalists. His career as the respected face and voice of British natural history programmes has endured more than 50 years and is widely considered one of the pioneers of the nature documentary. He is best known for writing and presenting the eight "Life" series. In 2007, Attenborough presented "Sharing Planet Earth", the first programme in a series of documentaries entitled Saving Planet Earth.